Sound velocity in liquid4He under pressure

Pat R. Roach*, J. B. Ketterson, B. M. Abraham, M. Kuchnir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We have measured the temperature dependence of the sound velocity in liquid4He at pressures from the vapor pressure to near the solidification pressure. The data were obtained at frequencies from 12 to 105 MHz and covered the temperature range from below 0.1 to nearly 1.0 K. The velocity data at high pressures do not show any anomaly that can be associated with a distinct shoulder found earlier in the sound attenuation. As observed previously at the vapor pressure, the frequency dependence of the velocity data undergoes an inversion at low temperatures; this unexpected behavior is in agreement with recent theoretical treatments.

Original languageEnglish (US)
Pages (from-to)375-385
Number of pages11
JournalJournal of Low Temperature Physics
Volume12
Issue number3-4
DOIs
StatePublished - Aug 1 1973

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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